P2C2: Northern Annular Mode (NAM) Variability during the Little Ice Age and Medieval Warm Period in a Cave Ice Core Record from Northwestern Romania

P2C2：罗马尼亚西北部洞穴冰芯记录中小冰期和中世纪温暖期的北环模（NAM）变化

• 批准号: 0823253
• 负责人: Bogdan Onac
• 金额: $ 13.27万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-10-01 至 2011-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0823253&HistoricalAwards=false
• 关键词: P2C2; Northern; Annular; Mode; NAM

Funding is provided to investigate the twin hypotheses that decade-to-century-scale climate variability was a persistent feature over the past two millennia in Eastern Europe and that the Little Ice Age and Medieval Warm Period were part of this pattern of decadal-to-centennial variability. Specifically, the researchers seek to obtain an annual to decadal resolved record of climate from layered ice and speleothems from caves in Northwestern Romania The researchers aim to address a number of important science questions that include: 1) What was the response of temperature and the hydrologic cycle to Northern Annular Mode (NAM) variability over the last 2,000 years in southeastern Europe? 2) What was the oxygen isotopic signature of extreme climate events during the Little Ice Age (LIA) and Medieval Warm Period (MWP) and how does this compare to other parts of the North Atlantic such as Greenland? 3) Is the spatial signature of the climate response, and published vegetation anomalies associated with the LIA and MWP, consistent with changes of the NAM? and 4) What are the combined effects of changes in radiative forcing and persistent NAM patterns on regional-scale climate?The broader impacts involve the possible development of a new archive for paleoclimate information; support of graduate student and postdoctoral scholars; the fostering of strong international cooperation between U.S. and Romanian scientists; and the development of educational displays for visitors to Apuseni National Park in Romania about cave environments and their role in climate studies.

提供资金调查的孪生假设，即十年到百年尺度的气候变化是一个持续的功能在过去的两千年在东欧和小冰河时代和中世纪温暖期的一部分，这种模式的十年到百年的变化。 具体来说，研究人员试图从罗马尼亚西北部洞穴的层状冰和洞穴沉积物中获得年度到十年的气候记录。研究人员的目标是解决一些重要的科学问题，包括：1）在过去的2,000年里，东南欧的温度和水文循环对北方环形模式（NAM）变化的反应是什么？2)在小冰期（LIA）和中世纪温暖期（MWP）期间极端气候事件的氧同位素特征是什么？与北大西洋其他地区（如格陵兰岛）相比如何？3)气候响应的空间特征，以及与LIA和MWP相关的已公布的植被异常，与NAM的变化一致吗？辐射强迫和持续NAM模式的变化对区域尺度气候的综合影响是什么？更广泛的影响包括可能开发一个新的古气候信息档案;支持研究生和博士后学者;促进美国和罗马尼亚科学家之间的强有力的国际合作;以及为罗马尼亚Apuseni国家公园的游客开发有关洞穴环境及其在气候研究中的作用的教育展示。